add test-library and ktlint

build.gradle.kts

@@ -3,6 +3,7 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 plugins {
     id("org.springframework.boot") version "3.3.4"
     id("io.spring.dependency-management") version "1.1.6"
+    id("org.jlleitschuh.gradle.ktlint") version "12.1.1"
     kotlin("jvm") version "1.9.25"
     kotlin("plugin.spring") version "1.9.25"
 }
@@ -26,6 +27,22 @@ dependencies {
     implementation("info.picocli:picocli-spring-boot-starter:4.7.6")
 
     testImplementation("org.springframework.boot:spring-boot-starter-test")
+
+    // Kotest
+    testImplementation("io.kotest:kotest-runner-junit5:5.9.1")
+    testImplementation("io.kotest:kotest-assertions-core:5.9.1")
+    testImplementation("io.kotest.extensions:kotest-extensions-spring:1.3.0")
+
+    // MockK
+    testImplementation("io.mockk:mockk:1.13.11")
+    testImplementation("com.ninja-squad:springmockk:4.0.2")
+
+    // WireMock
+    testImplementation("org.wiremock.integrations:wiremock-spring-boot:3.1.0")
+
+    // Testcontainers (versions managed by Spring Boot BOM)
+    testImplementation("org.springframework.boot:spring-boot-testcontainers")
+    testImplementation("org.testcontainers:testcontainers")
 }
 
 tasks.withType<KotlinCompile> {